The continuing onslaught and increasing range
of the invading Mysterian forces prompted the
Japanese Self-Defense Force to search for unconventional
means by which to fend off the terrible aggressors.
The Alpha-Class Aerial Battleships were a failure
on their own, and a new technology was pursued:
the Markalite Cannon! With the ability not only
to reflect the deadly beams of the Mysterians'
Dome but also to produce powerful rays on its
own accord, the futuristic device would have the
ability to wage war on the mysterious menace.
The weapon was far too enormous and far too conspicuous,
however, to be transported to battle by any normal
means. It would need a sufficient transport ship...

Towering over twice as tall as the highest skyscraper,
the vehicle that would carry the cannon into
the heat of combat, the Markalite GYRO (Giant
Yoked Rocket), released a blast of choking smoke
and a stream of searing fire as it launched into
the atmosphere. Leaning into a horizontal position,
the rocket released its thrusters, allowing them
to fall to the Earth below. As the Markalite
GYRO approached the enemy fortress, an explosion
split the gargantuan transport in two, and the
Markalite Cannon drifted gently to the ground,
cushioned by a modest rocket of its own. A second
Markalite Cannon descended to the ground soon
thereafter, and the epic battle for dominion
over the planet continued in full force in the
once peaceful Japanese countryside.